Rename www.sh to saturnin_www.sh

To maintain safety of colision and reflect purpose ('ffoo/saturnin_www.sh'
vs. 'libexec/saturnin-www.sh'), adding prefix 'saturnin_'.

libexec/saturnin-www

@@ -4,7 +4,8 @@
 
 ffoo import config
 ffoo import core
-ffoo import www
+
+ffoo import saturnin_www
 
 clipln() {
     #

setup/mk.sh

@@ -42,7 +42,7 @@ die() {
 }
 
 list_of_shrs() {
-    echo ffoo/www.sh
+    echo ffoo/saturnin_www.sh
 }
 
 build1() {